Self-Doubt

I've been thinking a lot lately, never a good thing, and I've begun to have serious doubts about asking Nick out at all. I've been trying to think of what I could offer him in a relationship, and I have come up blank. I think I may just be envious of his lifestyle. He is attractive, popular, outgoing, has lots of friends, goes out often to different places and has been abroad more times this year than I have in 17 years! Am I just after that? Or am I just grabbing on to the first person to show any interest in me other than a quick shag for the first time in ..... I can't remember how long?
I think I should still ask him out for drinks, otherwise I may always wonder "what if? But I am not hopeful of a positive reply.